#define _CRT_SECURE_NO_WARNINGS 1


#include<iostream>
using namespace std;

void mySwap(int& a, int& b)
{
	int tmp = a;
	a = b;
	b = tmp;
}

int main()
{
	int a = 10;
	int b = 20;
	mySwap(a, b);
	cout << "a=" << a << endl;
	cout << "b=" << b << endl;
	return 0;
}